diff --git a/media/mtp/MtpUtils.h b/media/mtp/MtpUtils.h
index 2e80762..edd78cb 100644
--- a/media/mtp/MtpUtils.h
+++ b/media/mtp/MtpUtils.h
@@ -20,6 +20,8 @@
 #include "utils/String8.h"
 #include "utils/Vector.h"
 
+namespace android {
+
 class MtpStorage;
 
 typedef android::Vector<MtpStorage *> MtpStorageList;
@@ -31,4 +33,6 @@
 bool parseDateTime(const char* dateTime, time_t& outSeconds);
 void formatDateTime(time_t seconds, char* buffer, int bufferLength);
 
+}; // namespace android
+
 #endif // _MTP_UTILS_H